The use of molecular hydrogen produced by photoelectrochemical cells is an alternative to fossil fuels, economically and environmentally. Hematite (α-Fe2O3) is a promising candidate to the realization of photoelectrochemical ...

Supermartensitic stainless steels were developed during the 1990s as an alternative to duplex stainless steels for manufacture of oil country tubular goods. As a result of microstructural variations caused during tempering ...

Ionomeric polymer-metal composites (IPMCs) are smart materials, which have a metal/polymer/metal sandwich-like structure and are capable to deform in response to electrical stimuli and vice versa. In addition, they have ...

Stents are medical devices which promote the opening and mechanical support of clogged blood vessels and, once applied, cannot be removed. The manufacture of bioabsorbable stents is desirable to avoid several subsequent ...

Agroindustrial residue from sugarcane generate more than 200 million tons of bagasse annually, rich in plant fibers that can be potentially applied in polymer composites. New processing routes are required to process ...

Sodium-based materials are promising candidates for manufacturing stationary storage devices such as batteries due to their low cost and the Na high redox potential. However, the corrosion, flammability, and the degradation ...

High temperature processes are of great importance as they are widely applied in the manufacture of commodities, consumer goods and advanced materials. For these processes to be possible, the thermal environment in which ...

In the present thesis, nanostructured coatings of Ti (100 - (20 + z)) -Nb20-Xz alloys (X = Zr and Mg) were produced by sputtering. So with that, it was possible to analyze the effect of the addition of Zr and Mg on the ...

The massive accumulation of plastic waste and its environmental impact is in great evidence today. Each year, more than 8 million tons end up in the oceans, so research indicates that there will be more plastics than fishs ...

Aluminum extrusion is a thermomechanical process widely used throughout the world, and the performance of this process is strongly dependent on the quality of the tool steel used in the manufacture of the dies. In this ...

Clean energies have become a growing quest for sustainable development. Within this context, solar energy stands out, which is renewable, practically inexhaustible and clean. The solar cell is the main instrument that ...

The glass-forming ability (GFA) is a measure of the easiness of vitrification of a liquid during cooling from the liquidus temperature. The GFA is inversely proportional to the critical cooling rate (Rc), whose determination ...

The precipitation of quasicrystalline phase in an α-Al dendritic matrix provides Al-based alloys with high mechanical and wear resistance, mainly at high temperatures, which are promising for applications as automotive and ...

Boron nitride (h-BN) is an attractive ceramic material that combines
excellent thermal, electrical and chemical properties. The combination of these
properties makes h-BN useful in the manufacturing of lubricants, ...

The rheo-optical behavior of polystyrene (PS), polypropylene (PP) and immiscible dilute mixtures of these polymers was studied in order to determine the flow birefringence and form birefringence of these materials. The ...

Hydrogen is a promising energy carrier that allows the use of energy in a sustainable form. However, safe and efficient hydrogen storage is a scientific and technological challenge that still has to be overcome. Recently ...

The present study evaluated the mechanical properties in monotonic and
cyclic stress of two low-density steel designed by thermodynamic calculations
aiming stacking fault energy values that would allow different plasticity ...

The identification of viscoelastic models is important for the design of polymeric parts by making the mechanical behavior of the material predictable under critical conditions. However, the characterization of this behavior ...

Carbon-containing refractories’ (CCRs) present special chemical and thermomechanical properties, which depend on the presence of carbonaceous phase with a structure similar to those of graphite. However, phenolic resins ...

The objective of this thesis was to produce polymer/perovskite based composites to be used as supercapacitors; the composites were made by incorporating an specified type of perovskite (Na1/3Ca1/3Bi1/3Cu3Ti4O12, NCBCTO) ...